新型可调刚度黏弹性阻尼器的设计制作、性能试验和力学模型

Design,performance testing and macroscopic model of a new-type viscoelastic damper with adjustable stiffness

磁流变弹性体(magnetorheological elastomer,简称MRE)是一种新型智能材料,它集磁流变材料和弹性体的优点于一身,同时又克服了磁流变液的颗粒沉降、稳定性不好等缺点,创新性地将磁流变弹性体智能材料代替常规黏弹性材料,提出了新型可调刚度黏弹性阻尼器的磁路设计方法和磁场分析方法。按照理论分析所确定的方案,设计制作了最大出力达到15 kN的可调刚度黏弹性阻尼器,并在液压伺服加载系统上完成了阻尼器的性能试验,试验表明新型阻尼器随电流的改变有一个连续可调的剪切刚度。最后,建立了适用于新型可调刚度黏弹性阻尼器的力学模型,并将模型仿真结果与试验数据进行比较,证明了力学模型的正确性。

Magnetorheological elastomer （MRE） is a new intelligent material. It combines the advantages of mag- netorheological material and elastomer, which overcomes the shortcomings of magnetorheological fluid, such as par- ticle sedimentation and poor stability. MRE material is used to substitute the common viscoelastic material and the magnetic field analysis method of the new-type viscoelastic damper with adjustable stiffness is proposed. The new- type viscoelastic damper with the maximum output force of 15 kN is designed and produced in accordance with the theoretical analysis progress. Then the performance experiment of the damper is carried out on the hydraulic servo device and the test result indicates that the new damper has a continuous adjustable shearing stiffness with the change of the current. Finally, the revised Kelvin model for the new-type viscoelastic damper is established and the model simulation results are compared with the experimental data and confirm the validity of the macroscopic mod- el.